A2 1/2x28 muzzle break for 5.56/.223 with crush washer

A2 muzzle break with crush washer 1/2 x 28 threaded .223/5.56 MUZZLE BRAKE SHORT RIGHT HAND THREAD LENGTH: 1.75" N.W. (OZ): 2.1 COMPATIBLE: 5.56/.223 BORE FEATURES: HEAT TREATED EROSION RESISTANT REDUCES CLIMB